Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Otfice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JUNE 9, 1970 T875,006 POLYMERIZATION PROCESS USING METAL BOROHYDRIDES AS CATALYSTS Werner S. Zimmt, Wynnewood, Pa., assignor to E. I. du

Pont de Nemours and Company, Wilmington, DeL, a corporation of Delaware Continuation-impart of application Ser. No. 408,671,

Nov. 3, 1964. This application July 26, 1968, Ser.

Int. Cl. C08f 3/64, 3/76 US. Cl. 26088.7 No Drawing. 11 Pages Specification A process for the bulk or solution polymerization of acrylic monomers using alkaline metaland alkaline earth metal borohydrides as catalysts. The process permits control of the steric configuration and physical properties of the resulting polymers. 

